Interference of chiral Andreev edge states
Abstract
© 2020, The Author(s), under exclusive licence to Springer Nature Limited. The search
for topological excitations such as Majorana fermions has spurred interest in the
boundaries between distinct quantum states. Here, we explore an interface between
two prototypical phases of electrons with conceptually different ground states: the
integer quantum Hall insulator and the s-wave superconductor. We find clear signatures
of hybridized electron and hole states similar to chiral Majorana fermions, which
we refer to as chiral Andreev edge states (CAESs). These propagate along the interface
in the direction determined by the magnetic field and their interference can turn
an incoming electron into an outgoing electron or hole, depending on the phase accumulated
by the CAESs along their path. Our results demonstrate that these excitations can
propagate and interfere over a significant length, opening future possibilities for
their coherent manipulation.
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Journal articlePermalink
https://hdl.handle.net/10161/21904Published Version (Please cite this version)
10.1038/s41567-020-0898-5Publication Info
(2020). Interference of chiral Andreev edge states. Nature Physics, 16(8). pp. 862-867. 10.1038/s41567-020-0898-5. Retrieved from https://hdl.handle.net/10161/21904.This is constructed from limited available data and may be imprecise. To cite this
article, please review & use the official citation provided by the journal.
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Show full item recordScholars@Duke
Harold U. Baranger
Professor of Physics
The broad focus of Prof. Baranger's group is quantum open systems at the nanoscale,
particularly the generation of correlation between particles in such systems. Fundamental
interest in nanophysics-- the physics of small, nanometer scale, bits of solid-- stems
from the ability to control and probe systems on length scales larger than atoms but
small enough that the averaging inherent in bulk properties has not yet occurred.
Using this ability, entirely unanticipated phenomena ca
Anne Draelos
Postdoctoral Associate
Gleb Finkelstein
Professor of Physics
Gleb Finkelstein is an experimental physicist interested in inorganic and biologically
inspired nanostructures: carbon nanotubes, graphene, and self-assembled DNA 'origami'.
These objects reveal a variety of interesting electronic properties that may form
a basis for future detectors and sensors, or serve as individual devices in quantum
information processing.
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